refactor(derived-leaves): remove createMayUseToken function and simpl…

…ify MayUseToken type

The createMayUseToken function was removed as it was not providing any additional functionality. The MayUseToken type was simplified to directly use the signable function with the parentsOwnToken and inheritFromParent fields of type Bool. This change reduces the complexity of the code without changing its behavior.

mina-transaction/derived-leaves.ts

@@ -95,10 +95,8 @@ function derivedLeafTypesSignable<Field, Bool>({
       }),
       Bool
     ),
-    MayUseToken: createMayUseToken(
-      signable({ parentsOwnToken: Bool, inheritFromParent: Bool }),
-      Bool
-    ),
+    MayUseToken: signable({ parentsOwnToken: Bool, inheritFromParent: Bool }),
+    Bool,
     ZkappUri: createZkappUri(Field, HashHelpers, packToFields),
   };
 }
@@ -199,20 +197,6 @@ function createAuthRequired<
   };
 }
 
-type MayUseToken<Bool> = {
-  parentsOwnToken: Bool;
-  inheritFromParent: Bool;
-};
-function createMayUseToken<
-  Field,
-  Bool,
-  Base extends GenericSignable<MayUseToken<Bool>, MayUseToken<boolean>, Field>
->(base: Base, _Bool: GenericSignableBool<Field, Bool>) {
-  return {
-    ...base,
-  };
-}
-
 function createZkappUri<Field>(
   Field: GenericSignableField<Field>,
   HashHelpers: HashHelpers<Field>,